Limestone massifs with a high density of dolines form important karst aquifers in most of the Alps, often with groundwater circulating through deep karst conduits and water coming out of closely spaced springs with flow rates of over some cubic meters per second. Although several hydrogeological studies and tracing experiments were carried out in many

Unmanned aerial vehicles (UAVs), otherwise known as “drones,” are among the most important technological advances that have been introduced to the land surveying industry in quite some time. These small, ultra-light weight aircraft can be piloted by remote and can take detailed survey information while simultaneously transmitting that data back to the head office. This